Riken Keiki GD-3EC, Technical Manual

Page: 125 / 177

7. Maintenance 7-4 Performing calibration
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<With standard range>
CAUTION

Perform span adjustment after supplying the span adjustment gas (at a concentration of 1.6 times the
alarm setpoint value or 40 % of full scale) and waiting for the reading to stabilize.

With the oxygen deficiency alarm specifications, introduce clean air to adjust to [20.9] (vol%).
1 Press the ▲ or ▼ key in maintenance mode several times
to select [2-2], then press the SET key.
2 Introduce the span adjustment gas, then press the SET key.
The SET key is disabled if the reading is less than 10 % of full
scale.
3 Press the ▲ or ▼ key to adjust the reading to match the
concentration of the gas introduced, then press the SET
key.
Span adjustment starts.
4 Check the span adjustment result.
If span adjustment is successful
[PASS] is displayed, followed by the
calibration concentration upper limit.
If span adjustment is unsuccessful
[FAIL] appears.
5 Press the SET key.
Returns to the [2-2] display.